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Surname Deshan (德山 , Deshan , 德善 ) , all around the world, is a common cognomen. The surname Deshan is characteristic of Sri Lanka, where it is quite a common surname, China, where it is a rare surname, and United Arab Emirates. In absolute terms, it is the most numerous in China, Sri Lanka, and the United States. More frequently, Deshan is the forename as well as the last name.